Question

EFETUE:

a) -12 + 4 + 11 - 8 + 13 +1

b) (+6) + (-14) + (-7) + (+6) + (+9)

c) -2 + 5 + 3 - 2 + 1

d) -7 - 3 - 9 + 8 -1 - 4

Answer 1

Resposta:

a) -12 + 4 + 11 - 8 + 13 +1

$- 8 + 3 + 14 \\ - 5 + 14 \\ 9$

b) (+6) + (-14) + (-7) + (+6) + (+9)

$6 - 14 - 7 + 6 + 9 \\ - 8 - 1 + 9 \\ - 9 + 9 \\ = 0$

c) -2 + 5 + 3 - 2 + 1

$3 + 1 + 1 \\ 4 + 1 \\ 5$

d) -7 - 3 - 9 + 8 -1 - 4

$- 10 - 1 - 5 \\ - 11 - 5 \\ - 16$